Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Byte.cs / 1 / Byte.cs
// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
/*============================================================
**
** Class: Byte
**
**
** Purpose: This class will encapsulate a byte and provide an
** Object representation of it.
**
**
===========================================================*/
namespace System {
using System;
using System.Globalization;
using System.Runtime.InteropServices;
// The Byte class extends the Value class and
// provides object representation of the byte primitive type.
//
[System.Runtime.InteropServices.ComVisible(true)]
[Serializable, System.Runtime.InteropServices.StructLayout(LayoutKind.Sequential)] public struct Byte : IComparable, IFormattable, IConvertible
#if GENERICS_WORK
, IComparable, IEquatable
#endif
{
private byte m_value;
// The maximum value that a Byte may represent: 255.
public const byte MaxValue = (byte)0xFF;
// The minimum value that a Byte may represent: 0.
public const byte MinValue = 0;
// Compares this object to another object, returning an integer that
// indicates the relationship.
// Returns a value less than zero if this object
// null is considered to be less than any instance.
// If object is not of type byte, this method throws an ArgumentException.
//
public int CompareTo(Object value) {
if (value == null) {
return 1;
}
if (!(value is Byte)) {
throw new ArgumentException(Environment.GetResourceString("Arg_MustBeByte"));
}
return m_value - (((Byte)value).m_value);
}
public int CompareTo(Byte value) {
return m_value - value;
}
// Determines whether two Byte objects are equal.
public override bool Equals(Object obj) {
if (!(obj is Byte)) {
return false;
}
return m_value == ((Byte)obj).m_value;
}
public bool Equals(Byte obj)
{
return m_value == obj;
}
// Gets a hash code for this instance.
public override int GetHashCode() {
return m_value;
}
public static byte Parse(String s) {
return Parse(s, NumberStyles.Integer, NumberFormatInfo.CurrentInfo);
}
public static byte Parse(String s, NumberStyles style) {
NumberFormatInfo.ValidateParseStyleInteger(style);
return Parse(s, style, NumberFormatInfo.CurrentInfo);
}
public static byte Parse(String s, IFormatProvider provider) {
return Parse(s, NumberStyles.Integer, NumberFormatInfo.GetInstance(provider));
}
// Parses an unsigned byte from a String in the given style. If
// a NumberFormatInfo isn't specified, the current culture's
// NumberFormatInfo is assumed.
public static byte Parse(String s, NumberStyles style, IFormatProvider provider) {
NumberFormatInfo.ValidateParseStyleInteger(style);
return Parse(s, style, NumberFormatInfo.GetInstance(provider));
}
private static byte Parse(String s, NumberStyles style, NumberFormatInfo info) {
int i = 0;
try {
i = Number.ParseInt32(s, style, info);
}
catch(OverflowException e) {
throw new OverflowException(Environment.GetResourceString("Overflow_Byte"), e);
}
if (i < MinValue || i > MaxValue) throw new OverflowException(Environment.GetResourceString("Overflow_Byte"));
return (byte)i;
}
public static bool TryParse(String s, out Byte result) {
return TryParse(s, NumberStyles.Integer, NumberFormatInfo.CurrentInfo, out result);
}
public static bool TryParse(String s, NumberStyles style, IFormatProvider provider, out Byte result) {
NumberFormatInfo.ValidateParseStyleInteger(style);
return TryParse(s, style, NumberFormatInfo.GetInstance(provider), out result);
}
private static bool TryParse(String s, NumberStyles style, NumberFormatInfo info, out Byte result) {
result = 0;
int i;
if (!Number.TryParseInt32(s, style, info, out i)) {
return false;
}
if (i < MinValue || i > MaxValue) {
return false;
}
result = (byte) i;
return true;
}
public override String ToString() {
return Number.FormatInt32(m_value, null, NumberFormatInfo.CurrentInfo);
}
public String ToString(String format) {
return Number.FormatInt32(m_value, format, NumberFormatInfo.CurrentInfo);
}
public String ToString(IFormatProvider provider) {
return Number.FormatInt32(m_value, null, NumberFormatInfo.GetInstance(provider));
}
public String ToString(String format, IFormatProvider provider) {
return Number.FormatInt32(m_value, format, NumberFormatInfo.GetInstance(provider));
}
//
// IValue implementation
//
public TypeCode GetTypeCode() {
return TypeCode.Byte;
}
///
bool IConvertible.ToBoolean(IFormatProvider provider) {
return Convert.ToBoolean(m_value);
}
///
char IConvertible.ToChar(IFormatProvider provider) {
return Convert.ToChar(m_value);
}
///
sbyte IConvertible.ToSByte(IFormatProvider provider) {
return Convert.ToSByte(m_value);
}
///
byte IConvertible.ToByte(IFormatProvider provider) {
return m_value;
}
///
short IConvertible.ToInt16(IFormatProvider provider) {
return Convert.ToInt16(m_value);
}
///
ushort IConvertible.ToUInt16(IFormatProvider provider) {
return Convert.ToUInt16(m_value);
}
///
int IConvertible.ToInt32(IFormatProvider provider) {
return Convert.ToInt32(m_value);
}
///
uint IConvertible.ToUInt32(IFormatProvider provider) {
return Convert.ToUInt32(m_value);
}
///
long IConvertible.ToInt64(IFormatProvider provider) {
return Convert.ToInt64(m_value);
}
///
ulong IConvertible.ToUInt64(IFormatProvider provider) {
return Convert.ToUInt64(m_value);
}
///
float IConvertible.ToSingle(IFormatProvider provider) {
return Convert.ToSingle(m_value);
}
///
double IConvertible.ToDouble(IFormatProvider provider) {
return Convert.ToDouble(m_value);
}
///
Decimal IConvertible.ToDecimal(IFormatProvider provider) {
return Convert.ToDecimal(m_value);
}
///
DateTime IConvertible.ToDateTime(IFormatProvider provider) {
throw new InvalidCastException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("InvalidCast_FromTo"), "Byte", "DateTime"));
}
///
Object IConvertible.ToType(Type type, IFormatProvider provider) {
return Convert.DefaultToType((IConvertible)this, type, provider);
}
}
}
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